Ordinary text is written in English ASCII code.
Unicode uses 16 bit encoding, while ASCII uses 7 bit encoding, and the encoding meaning has its own definition. Although GB is also a 16 bit encoding, its encoding meaning is completely different from unicode.
Unicode text should have a certain structure besides 16 bit code to distinguish the beginning and end of the language.
To display unicode text, in addition to the display software, there must be a unicode font (font file) corresponding to a certain language.